Access the oxylbox via LinkstationIPAddress at port 81 and setup the oxylbox via oxyl-setup. Make sure you set the playlist directory, choose the language, set showcenter ip and last but not least update the software to v31. Update and install all plugins and skins that become visible on setup page after the update to 31.

Modify the file functions.inc in the directory /mnt/opt/apache/htdocs/oxylbox/common in the following way:

A. in the getthumbhref function is needed to submit the original image extension to the do_imgconvert function:

B.
in the do_imgconvert function initialisation the parameter $org_ext is set to "". Because of this, the if selection would never use the GD lib functions.
Since we now submit this parameter (see 1.) we have to remove this initialisation:

C.
in the do_imgconvert function a check is done for the image extensions, which can't be converted by nconvert (to use GD Lib only for the unsupported formats by nconvert). Since we are using GD Lib for all extensions, we have to remove this check: